Welding characteristics of aluminum alloy by pulsed nd:Yag laser with pre-and post-irradiation of superposed continuous diode laser

Shin Ichi Nakashiba, Yasuhiro Okamoto, Tomokazu Sakagawa, Kazuya Miura, Akira Okada, Yoshiyuki Uno

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

Authors developed the high-performance microwelding of aluminum alloy, in which the superposition of continuous diode laser of wavelength 808nm and pulsed Nd:YAG laser of wavelength 1064nm could perform the high-processing speed, the deeper penetration depth and the wider bead width. However, the penetration depth at the beginning of laser scanning was insufficient, and the evaluation of cracks was not cleared yet. Therefore, in this study, the effects of preand post-heating with continuous diode laser on welding phenomena of aluminum alloy were experimentally and numerically investigated. The combination of continuous diode laser and pre-heating pulse of Nd:YAG laser without melting of specimen surface could keep the high surface temperature, which led to the stable deeper penetration and wider bead width with smooth surface integrity even at the beginning of laser scanning. Moreover, it was confirmed that the superposition of continuous diode laser was effective to improve a welding quality of aluminum alloy, since the superposition of continuous diode laser prevented rapid heating and cooling of aluminum alloy. The post-heating with continuous diode laser kept the gentle temperature gradient at the laser spot, and the generation of crack could be decreased by appropriate power and irradiation time of continuous diode laser.

Original languageEnglish
Pages825-832
Number of pages8
DOIs
Publication statusPublished - Jan 1 2011
Event30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 - Orlando, FL, United States
Duration: Oct 23 2011Oct 27 2011

Other

Other30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011
CountryUnited States
CityOrlando, FL
Period10/23/1110/27/11

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Nakashiba, S. I., Okamoto, Y., Sakagawa, T., Miura, K., Okada, A., & Uno, Y. (2011). Welding characteristics of aluminum alloy by pulsed nd:Yag laser with pre-and post-irradiation of superposed continuous diode laser. 825-832. Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States. https://doi.org/10.2351/1.5062333